gnupic: Re: [gnupic] help - DIY PCB manufacture
Subject:
Re: [gnupic] help - DIY PCB manufacture
From:
niv levy ####@####.####
Date:
29 May 2005 17:17:50 +0100
Message-Id: <20050529161722.20771.qmail@web32803.mail.mud.yahoo.com>
Hi,
I've used transfer methods to make a few PCBs a year
or two ago. I used a cheap photo paper meant for an
inkjet which i ran through a laser printer ( i think i
paid ~5$ for it - but it was in Israel). The paper
was then ironed on the board, using a piece of Al foil
(to avoid dragging it around and improve the heat
transfer) for a minute or two, putting lots of
pressure on it. I dissolved the paper in a solution of
water and bleach ( pretty low concentration - i don't
remember the exact numbers - use gloves in any case)
for ~30 - 60 min as far as i remember.
The thinnest tracks i could get were 12 mil (0.3mm)-
10 mil also came out, but appeared very ragged, on the
edge of usability.
let me know if you want more details - i'll try
finding my notes from back then.
niv
--- David McNab ####@####.#### wrote:
> Hi all,
>
> I need some advice on home PCB manufacture.
>
> I've created PCB artwork in Eagle - single-sided
> with 4 manual wires on
> the top side - a 65mm x 65mm board with 0.625mm
> tracks.
>
> On a salesman's advice, I bought a pack of PCB
> transfer film sheets @
> $45 (ouch!) - the kind that you run through the
> laser printer then iron
> onto a plain copper board.
>
> After three failed attempts (varying heat/duration),
> I've hit a wall.
>
> Most of the artwork transfers onto the board just
> fine, but with each
> attempt I've ended up with 5 or 6 broken tracks. The
> tracks are so fine
> that hand-repairing with an etch-resist pen would be
> difficult, if I can
> do it at all. Also,
>
> Is it just me, or is iron-on transfer film simply
> not up to the task for
> fine tracks?
>
> Would I be better off using photo-sensitive boards,
> printing onto
> transparent film, exposing, developing, etching,
> developing, cleaning?
>
> For those of you making your own PCBs, what methods
> are working best for
> you?
>
> Or, is home PCB manufacture more trouble than it's
> worth? Am I better
> off finding a company who can do it for me at the
> best price?
>
> --
> Cheers
> David
>
>
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